ALDRICTI : DOI.ICHOI'US AND HVCROCKI.F.UTHUS. I5 



witli little dust. Abdomen green, coppery, the lamellae white, oval, 

 with the usual dark margin, notches, and bristles. Coxae black, the 

 fore ones a little lighter toward the tip. Hind femora ciliated with 

 moderately long reddish or brownish hairs. Fore tarsi once and a 

 half the length of the tibiae, the first three joints red, the last two 

 black, compressed: middle tarsi black from the last third of the first 

 joint; hind tarsi and last fourth of tibiae black. Wings hyaline, the 

 first flexure of the fourth vein abrupt, in some cases minutely appen- 

 diculated, but usually a little rounded. Costa thickened very consid- 

 erably, gradually diminishing toward the apex. 



Female. Face whitish, fore tarsi plain, as long as the tibiae, black- 

 ened from the tip of the first joint; hind femora not ciliated. 



Length, 4 mm. ; of wnng, the same. 



Three males and four females, Wyoming (U. K.), Manitou Park, 

 Col., July (Snow). 



Dolichopus gracilis, n. sp. 



Male; antennae wholly red, cilia of inferior orbit pale, of tegulae 

 black, legs yellow, hind tarsi wholly black. 



Face narrow, grayish yellow, more yellow toward the antennae; 

 front green; antennae moderately long. Thorax greenish bronze, 

 pleurae dark green, dusted with gray. Abdomen more pure green, the 

 sides below whitish dusted, with yellow hair. Hypopygium black, 

 the lamellae small, dirty whitish, rounded, deeply jagged, with the 

 usual curved and branched bristles. Fore coxae light yellow, in 

 front almost white, with microscopic, sparse white hairs. Middle and 

 hind coxae blackish at base, toward the tip more yellowish. Hind 

 femora with a scattered row of long pale cilia below; all tibiae yellow. 

 Fore tarsi one and one-half times as long as the tibiae, blackened 

 from the tip of the first joint; hind tarsi wholly black. Wings sightly 

 yellowish, costa scarcely thickened. 



Length, 4 mm.; of wircg, 4.1 mm. 



A single male, Philadelphia, Pa., August 4 (C. W. Johnson). 



Dolichopus angustatus, n. sp. 



Male. Antennae black, first joint in part yellow, third joint very 

 wide and long, with a sharp point; cilia of inferior orbit pale, of 

 tegulae black, last joint of fore tarsus enlarged. 



Face grayish yellow, front shining violet; first joint of antennae 

 slender, arista inserted beyond the middle of third joint. Thorax 

 bright bluish green, with a bronze stripe each side above the root of 

 the wing, and a very narrow one in the middle; pleurae dark green, 

 light dusted. Abdomen somewhat bluish green, more bronze before 



